Wipe all data from device that t1g Advan you back as light as it was before the time you've bought it from the store then you can do the factory reset so that all user data will be gone altogether including gmai account, third party applications, contacts, and so on.

Advan t1g detail used;

Model number: Advan T1G

Android version: 4.2.2

The version of the base Ribbon: MOLY. URWR8.W1315.MD.WG.MP.,2014 p16 > V1/2/3 9:02 pm

Kernel version: 3.4.5

A build number: GP631_ADVAN_T1G_72_H1_V 1.1 _20140512

Here's how to factory reset Advan t1g:

Advan position illuminates

Select menu

Select settings

Select create backup & reset

Select Restore to factory settings

Read the first caption

Check the Delete storage tablet (delete all data on the storage of tablets, such as music or photos)